CN112994724A - Wireless communication device, related method and electronic device - Google Patents
Wireless communication device, related method and electronic device Download PDFInfo
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- CN112994724A CN112994724A CN202011348795.7A CN202011348795A CN112994724A CN 112994724 A CN112994724 A CN 112994724A CN 202011348795 A CN202011348795 A CN 202011348795A CN 112994724 A CN112994724 A CN 112994724A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0235—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a power saving command
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0278—Traffic management, e.g. flow control or congestion control using buffer status reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/02—Data link layer protocols
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The wireless communication device includes an aggregation circuit, a processing circuit, and a transmitter. The aggregation circuit is configured to perform an aggregation operation to generate a Physical Layer Convergence (PLCP) protocol data unit (PPDU). The processing circuit is coupled to the aggregation circuit and arranged to generate a first indicator indicating a length of the PPDU and include the first indicator in a first field in a preamble of the PPDU. A transmitter is coupled to the processing circuit and configured to transmit the PPDU to an access point.
Description
Technical Field
The present invention relates to a wireless communication device, and more particularly, to a wireless communication device that can save communication time and power, and an associated method and electronic device.
Background
One of the features of the IEEE 802.11ax specifications is that an Access Point (AP) sends a trigger frame to schedule Uplink (UL) Resource Units (RUs) for a plurality of Stations (STAs). To provide efficient RU allocation, the AP needs to have the UL buffer status of the STA. Therefore, the AP needs to determine the appropriate Physical Layer Convergence (PLCP) protocol data unit (PPDU) length for PPDU-based UL triggering in the trigger frame, as well as its specific fields, such as legacy signal field (L-SIG). For Single User (SU) transmissions, the throughput of STAs following the trigger frame sent by the AP may be low, which results in wasted airtime as well as power, since the aggregate size estimated by the AP is inaccurate due to the large variation in the size of each packet.
There is a need for novel wireless communication devices and methods to address the above-mentioned problems.
Disclosure of Invention
It is an object of the present invention to provide a wireless communication device, related method and electronic device to solve the above problems.
According to an embodiment of the present invention, there is disclosed a wireless communication apparatus including: aggregation circuitry, processing circuitry, and a transmitter. The aggregation circuit is configured to perform an aggregation operation to generate a Physical Layer Convergence (PLCP) protocol data unit (PPDU). The processing circuit is coupled to the aggregation circuit and configured to generate a first indicator indicating a length of the PPDU and include the first indicator in a first field in a preamble of the PPDU. A transmitter is coupled to the processing circuit and configured to transmit the PPDU to an Access Point (AP).
According to an embodiment of the present invention, there is disclosed a wireless communication method including: performing an aggregation operation to generate a Physical Layer Convergence (PLCP) protocol data unit (PPDU); generating a first indicator indicating a length of the PPDU and including the first indicator in a first field in a preamble of the PPDU; the PPDU is transmitted to an Access Point (AP).
According to an embodiment of the present invention, there is disclosed an electronic apparatus including: a transmitter, a storage device, and a processor. The transmitter is configured to transmit a signal to an Access Point (AP). The storage device is configured to store program code. The processor is configured to execute program code, wherein the program code, when loaded and executed by the processor, instructs the processor to perform the steps of: performing an aggregation operation to generate a Physical Layer Convergence (PLCP) protocol data unit (PPDU); generating a first indicator indicating a length of the PPDU and including the first indicator in a first field in a preamble of the PPDU; controlling the transmitter to transmit the PPDU to the AP.
These and other objects of the present invention will no doubt become obvious to those of ordinary skill in the art after having read the following detailed description of the preferred embodiments which are illustrated in the various drawing figures and drawings.
Drawings
Fig. 1 is a diagram illustrating a wireless communication apparatus communicating with an AP according to an embodiment of the present invention.
Fig. 2 is a flowchart illustrating a wireless communication method according to an embodiment of the present invention.
Fig. 3 is a flowchart illustrating a wireless communication method according to another embodiment of the present invention.
Fig. 4 is a schematic diagram illustrating communication between an AP and a wireless communication device according to an embodiment of the present invention.
Fig. 5 is a diagram illustrating an electronic device according to an embodiment of the present invention.
Detailed Description
Certain terms are used throughout the description and following claims to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to components by different names. This document does not intend to distinguish between components that differ in name but not function. In the following description and claims, the terms "comprise" and "comprise" are used in an open-ended fashion, and thus should not be interpreted as closed-ended terms, such as "consisting of. Likewise, the term "coupled" is intended to mean either an indirect or direct electrical connection. Thus, if one device couples to another device, that connection may be through a direct electrical connection, or through an indirect electrical connection via other devices and connections.
Fig. 1 is a diagram illustrating a wireless communication device 10 communicating with an Access Point (AP)20 according to an embodiment of the present invention. In this embodiment, the wireless communication device 10 may be any type of device that wirelessly communicates with the AP 20. For example, the wireless communication device 10 may be a mobile telephone, a personal computer (e.g., a desktop or laptop computer), a personal digital assistant, or the like; and the present invention is not limited to these examples. The wireless communication device 10 includes a receiver 110, a control circuit 120, an aggregation circuit 130, a calculation circuit 140, a processing circuit 150, and a transmitter 160. As shown in fig. 1, the wireless communication device 10 receives a trigger frame TRI for initiating communication transmitted by the AP 20 via the receiver 110. The receiver 110 transmits the received trigger frame TRI to the control circuit 120. The control circuit 120 is configured to check the received trigger frame TRI to generate a check result CR. Some fields in the trigger frame TRI, such as the Receiver Access (RA) field or the user information field, indicate that all devices are destined to receive this trigger frame TRI. The control circuit 120 checks the above-mentioned field in the trigger frame TRI to determine whether the trigger frame TRI is transmitted only to the wireless communication apparatus 10, i.e., Single User (SU) transmission, and generates the check result CR accordingly. The aggregation circuit 130 is configured to perform an aggregation operation on data to be transmitted to the AP 20 in SU Uplink (UL) transmissions to generate a Physical Layer Convergence (PLCP) protocol data unit (PPDU). The calculation circuit 140 is configured to calculate the length of the PPDU based on an indication of the trigger frame, sequence number information such as a Block Acknowledgement (BA) transmitted by the AP 20, or from the PPDU generated by the aggregation circuit 130.
In one embodiment, when the control circuit learns that the trigger frame TRI is only sent to the wireless communication device, i.e. SU transmission, the control circuit 120 generates the check result CR accordingly. The aggregation circuit 130 directly performs an aggregation operation on data to be transmitted to the AP 20 to generate the PPDU without referring to a length defined by an indicator of a specific field in the preamble of the trigger frame TRI. For example, the specific field is a legacy signal field (L-SIG), and the indicator is a value represented by the L-SIG. Then, the calculation circuit 140 calculates the length of the PPDU based on the PPDU generated by the aggregation circuit 130.
In another embodiment, the calculation circuit 140 calculates the length of the PPDU based on the sequence number information (sequence number information) before the receiver 110 receives the trigger frame TRI without referring to the length defined by the L-SIG of the trigger frame TRI. Since a person having ordinary skill in the art should easily understand the calculation of the PPDU length based on the sequence number information, a detailed description is omitted herein for the sake of brevity. When the trigger frame TRI is received and the check result CR indicates that the received trigger frame TRI is transmitted only to the wireless communication apparatus 10, the aggregation circuit 130 performs an aggregation operation on data to be transmitted to the AP 20 according to the length of the PPDU to be calculated by the calculation circuit 140 to generate the PPDU.
As mentioned in the prior art, with respect to SU transmission, due to the large variation in the size of each packet, the aggregation size estimated by the AP 20 is inaccurate, resulting in a waste of communication time and power. However, in the foregoing embodiment, the length of the PPDU is determined without referring to the trigger frame TRI. As more PPDU length is saved, communication time and power are reduced accordingly.
Reference is again made to fig. 1. After the PPDU is generated by the aggregation circuit 130 and the length of the PPDU is calculated by the calculation circuit 140, the processing circuit 150 generates the indicator I according to the length of the PPDU1And will indicate the character I1Writing into the L-SIG of the preamble of the PPDU. The transmitter 160 transmits the PPDU having the newly calculated L-SIG to the AP 20 to inform the length of the PPDU.
In addition, when the control circuit learns not only to transmit the trigger frame TRI to the wireless communication apparatus, i.e., multi-user (MU) transmission, the control circuit generates the check result CR accordingly. The calculation circuit 140 calculates the length of the PPDU based on the indicator of the L-SIG in the preamble of the trigger frame TRI. Therefore, the aggregation circuit 130 will perform an aggregation operation on data to be transmitted to the AP 20 according to the length of the PPDU calculated by the calculation circuit 140. In this case, the calculation circuit 140 calculates the length of the PPDU defined by the transmission of the trigger frame TRI by the AP 20, and the aggregation circuit 130 performs an aggregation operation according to the length calculated by the calculation circuit 140 to generate the PPDU. Since the length of the PPDU is defined by the AP 20, the processing circuit 150 does not write the length of the PPDU to the L-SIG in the preamble of the PPDU, and the transmitter 160 transmits the PPDU to the AP 20.
Fig. 2 is a flowchart illustrating a wireless communication method of the wireless communication apparatus 10 according to an embodiment of the present invention. Assuming that the results are substantially the same, the steps need not be performed in the exact order shown in fig. 2. The wireless communication method is summarized as follows:
step 201: the control circuit 120 checks the received trigger frame TRI and generates a check result CR;
step 202: does the check result CR indicate that the trigger frame TRI is transmitted only to the wireless communication apparatus 10? If yes, go to step 203; otherwise, go to step 206;
step 203: the aggregation circuit 130 performs an aggregation operation to generate a PPDU without referring to the L-SIG of the trigger frame TRI;
step 204: the calculation circuit 140 calculates the length of the PPDU from the PPDU generated by the aggregation circuit 130;
step 205: the processing circuit 150 generates the indicator I according to the length of the PPDU1And will indicate the character I1Writing into an L-SIG in a preamble of the PPDU;
step 206: the calculation circuit 140 calculates the length of the PPDU according to the L-SIG in the preamble of the trigger frame TRI;
step 207: the aggregation circuit 130 performs an aggregation operation according to the length of the PPDU calculated by the calculation circuit 140 to generate a PPDU;
step 208: the transmitter 160 transmits the PPDU to the AP 20.
After reading the embodiment of fig. 1, those having ordinary skill in the art should readily understand the wireless communication method illustrated in fig. 2. A detailed description is omitted for the sake of brevity.
Fig. 3 is a flowchart illustrating a wireless communication method of the wireless communication apparatus 10 according to another embodiment of the present invention. Assuming that the results are substantially the same, the steps need not be performed in the exact order shown in fig. 3. The wireless communication method is summarized as follows:
step 301: the calculation circuit 140 calculates the length of the PPDU according to the serial number information;
step 302: the control circuit 120 checks the received trigger frame TRI and generates a check result CR;
step 303: does the check result CR indicate that the trigger frame TRI is transmitted only to the wireless communication apparatus 10? If yes, go to step 304; otherwise, go to step 306;
step 304: the aggregation circuit 130 performs an aggregation operation according to the length of the PPDU calculated by the calculation circuit 140 to generate a PPDU;
step 305: the processing circuit 150 is according to PPDLength generation indicator I of U1And will indicate the character I1Writing into an L-SIG in a preamble of the PPDU;
step 306: the calculation circuit 140 calculates the length of the PPDU according to the L-SIG in the preamble of the trigger frame TRI;
step 307: the aggregation circuit 130 performs an aggregation operation according to the length of the PPDU calculated by the calculation circuit 140 to generate a PPDU;
step 308: the transmitter 160 transmits the PPDU to the AP 20.
After reading the embodiment of fig. 1, a person having ordinary skill in the art should readily understand the wireless communication method illustrated in fig. 3. A detailed description is omitted for the sake of brevity.
Fig. 4 is a schematic diagram illustrating communication between the AP 20 and the wireless communication device 10 according to an embodiment of the present invention. Referring to fig. 4, the AP 20 transmits a trigger frame TRI (labeled as "PRE" in fig. 4) having a preamble, such as a frame control field (frame control field), a duration field, an RA field, a Transmitter Address (TA) field, a common information field, at least one user information field, a padding field, and a Frame Control Sequence (FCS) field. As described above, the control circuit 120 of the wireless communication device 10 can know whether the trigger frame TRI is transmitted only to the device 10 by checking the RA field and the user information field. As is well known to those of ordinary skill in the art. Therefore, a detailed description of the format of the trigger frame TRI is omitted for the sake of brevity. In addition, the L-SIG in the preamble of the trigger frame TRI defines the length of the PPDU estimated by the AP 20. After the receiver 110 of the wireless communication device 10 receives the trigger frame TRI, the wireless communication device 10 applies the wireless communication method illustrated in the embodiments of fig. 2, 3. When the trigger frame TRI is transmitted only to the wireless communication apparatus 10, the L-SIG in the preamble of the PPDU indicates to the AP 20 the length of the PPDU calculated by the calculation circuit 140 of the wireless communication apparatus 10. Conventionally, when the wireless communication apparatus 10 generates the PPDU with a length defined by the AP 20, if the estimated length is longer than a MAC Protocol Data Unit (MPDU) of the PPDU, some padding bits will be used in the remaining duration. In the embodiment proposed by the present invention, the wireless communication apparatus 10 calculates the length of PPDU without referring to the length estimated by the AP 20. The capacity of the padding bits used in the prior art can be saved, thereby saving communication time and power.
It should be noted that the implementation of those circuits shown in fig. 1 is not a limitation of the present invention. In other words, the circuitry shown in fig. 1 may be implemented in hardware, software, or firmware.
Fig. 5 is a schematic diagram illustrating an electronic device 500 to which the wireless communication method of fig. 2 and 3 is applied. Referring to fig. 5, the electronic device 500 comprises a memory device 501 for storing program code PROG and a processor 502, a transmitter 503 and a receiver 504, wherein the processor 502 is configured to perform the wireless communication method as proposed by the present invention and is further configured to control the transmitter 503 to transmit the PPDU to the AP and to control the receiver 504 to receive the trigger frame TRI from the AP. The program code PROG, when loaded and executed by the processor 502, instructs the processor 502 to perform the method of wireless communication illustrated in the flow charts of fig. 2, 3. A detailed description is omitted here for the sake of brevity.
Briefly summarized, embodiments of the present invention propose a wireless communication apparatus and an associated wireless communication method that save the length of a PPDU as well as communication time and power by calculating the length of the PPDU without referring to the length of the PPDU estimated by an AP and generating the PPDU according to the calculated length.
Those skilled in the art will readily observe that numerous modifications and alterations of the apparatus and method may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.
Claims (20)
1. A wireless communications apparatus, comprising:
an aggregation circuit to generate a Physical Layer Convergence (PLCP) protocol data unit (PPDU);
processing circuitry coupled to the aggregation circuitry, wherein the processing circuitry generates a first indicator indicating a length of a protocol data unit and includes the first indicator in a first field of a preamble of the protocol data unit; and
a transmitter coupled to the processing circuit and configured to transmit the protocol data unit to an Access Point (AP).
2. The wireless communications apparatus of claim 1, wherein the first field in the preamble of the protocol data unit is a legacy signal field (L-SIG).
3. The wireless communication apparatus of claim 1, further comprising:
a receiver for receiving a trigger frame from the access point; and
a control circuit coupled to the receiver, wherein the control circuit is configured to check the trigger frame to generate a check result indicating whether the trigger frame is transmitted only to the wireless communication apparatus.
4. The wireless communication apparatus of claim 3, further comprising:
a calculation circuit coupled to the aggregation circuit, wherein the calculation circuit is at least configured to calculate a length of the protocol data unit according to the sequence number information, and when the check result indicates that the trigger frame is only transmitted to the wireless communication device, the aggregation circuit performs the aggregation operation according to the length calculated by the calculation circuit to generate the protocol data unit.
5. The wireless communication apparatus of claim 3, wherein when the check result indicates that the trigger frame is only sent to the wireless communication apparatus, the aggregation circuit performs the aggregation operation to generate the protocol data unit, and wherein the wireless communication apparatus further comprises:
a calculation circuit coupled to the aggregation circuit, wherein the calculation circuit is configured to calculate a length of the protocol data unit after the protocol data unit is generated.
6. The wireless communications apparatus of claim 3, wherein the control circuitry examines a Receiver Access (RA) field or a user information field in the trigger frame to generate the examination result.
7. The wireless communication apparatus of claim 3, further comprising:
a calculation circuit coupled to the aggregation circuit, wherein the calculation circuit is configured to calculate a length of the protocol data unit according to the trigger frame when the check result indicates that the trigger frame is not only transmitted to the wireless communication apparatus; the aggregation circuit performs an aggregation operation to generate the protocol data unit according to the length of the protocol data unit calculated by the calculation circuit.
8. The wireless communication apparatus of claim 7, wherein the calculation circuitry calculates the length of the protocol data unit based on a second indicator of a second field in the preamble of the trigger frame.
9. The wireless communications apparatus of claim 8, wherein the second field in the preamble of the trigger frame is a legacy signal field (L-SIG).
10. A wireless communication method of a wireless communication apparatus, comprising:
generating a Physical Layer Convergence (PLCP) protocol data unit (PPDU);
generating a first indicator indicating a length of the protocol data unit and including the first indicator in a first field of a preamble of the protocol data unit; and
the protocol data unit is sent to an Access Point (AP).
11. The method of claim 10, wherein the first field in the preamble of the protocol data unit is a legacy signal field (L-SIG).
12. The wireless communication method according to claim 10, further comprising:
receiving a trigger frame from an access point; and
the trigger frame is checked to generate a check result indicating whether the trigger frame is transmitted only to the wireless communication apparatus.
13. The wireless communication method according to claim 12, further comprising:
calculating the length of the protocol data unit at least according to the block acknowledgement sequence number;
wherein the step of generating the protocol data unit comprises:
when the check result indicates that the trigger frame is transmitted only to the wireless communication apparatus, the protocol data unit is generated according to the length of the protocol data unit.
14. The wireless communication method according to claim 12, wherein when the check result indicates that the trigger frame is transmitted only to the wireless communication apparatus, the step of generating the protocol data unit further comprises:
after the protocol data unit is generated, the length of the protocol data unit is calculated.
15. The wireless communication method of claim 12, wherein the step of checking the trigger frame to generate the check result comprises:
a Receiver Access (RA) field or a user information field is checked in the trigger frame to generate a check result.
16. The wireless communication method according to claim 12, further comprising:
calculating the length of the protocol data unit according to the trigger frame when the checking result indicates that the trigger frame is not only transmitted to the wireless communication device;
wherein the step of performing an aggregation operation to generate protocol data units comprises:
according to the length of the protocol data unit, an aggregation operation is performed to generate the protocol data unit.
17. The wireless communication method according to claim 16, wherein the step of calculating the length of the pdu according to the trigger frame comprises:
calculating the length of the PDU according to a second indicator of a second field in the preamble of the trigger frame.
18. The method of claim 17, wherein the second field in the preamble of the trigger frame is a legacy signal field (L-SIG).
19. An electronic device, comprising:
a transmitter for transmitting a signal to an Access Point (AP);
storage means for storing program code; and
a processor for executing program code;
wherein the program code, when loaded and executed by a processor, instructs the processor to perform the steps of:
performing an aggregation operation to generate a Physical Layer Convergence (PLCP) protocol data unit (PPDU);
generating a first indicator indicating a length of the protocol data unit and including the first indicator in a first field in a preamble of the protocol data unit; and
the control transmitter transmits the protocol data unit to the access point.
20. The electronic apparatus of claim 19, wherein the first field in the preamble of the protocol data unit is a legacy signal field (L-SIG).
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| WO2017107688A1 (en) * | 2015-12-25 | 2017-06-29 | 华为技术有限公司 | Resource indication method and apparatus based on multiple time periods |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20210185708A1 (en) | 2021-06-17 |
| CN112994724B (en) | 2022-07-26 |
| US11224058B2 (en) | 2022-01-11 |
| TW202126087A (en) | 2021-07-01 |
| TWI763154B (en) | 2022-05-01 |
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